diff --git a/src/modules/generator/Makefile.am.include b/src/modules/generator/Makefile.am.include
index bc3c514f..69933e99 100644
--- a/src/modules/generator/Makefile.am.include
+++ b/src/modules/generator/Makefile.am.include
@@ -1,5 +1,6 @@
 include_HEADERS += include/secp256k1_generator.h
 noinst_HEADERS += src/modules/generator/main_impl.h
+noinst_HEADERS += src/modules/generator/tests_impl.h
 if USE_BENCHMARK
 noinst_PROGRAMS += bench_generator
 bench_generator_SOURCES = src/bench_generator.c